override archive__post_type as it is used as CSS class

Author: aschanMarcus

src/ArchivePageComponent.php

@@ -117,6 +117,9 @@ public function add_timber_context($context)
                     ]);
                     break;
             }
+
+            // Override `archive__post_type` as it is used as a CSS class
+            $context['post']->archive__post_type = $object_name;
         }
 
         return $context;